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https://dev.mysql.com/doc/refman/8.0/en/host-cache.html
The MySQL server maintains an in-memory host cache that contains information about clients: IP address, host name, and error information. The cache contains information about errors that occur during the client connection process. Some errors are ...The Performance Schema host_cache table exposes the contents of the host cache so that it can be examined using SELECT ...
https://dev.mysql.com/doc/refman/8.0/en/replication-options-binary-log.html
If you specify --log-slave-updates or --slave-preserve-commit-order together with --skip-log-bin or --disable-log-bin, a warning or error message is issued. Setting this variable on the source to a value unrecognized by the replica causes the ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-what-is-new.html
Instead, use ndb_perror to obtain error message information from NDB error codes. Beginning with this release, MySQL NDB Cluster is being developed in parallel with the standard MySQL 8.0 server under a new unified release model with the following ... The following sections describe changes in the implementation of MySQL NDB Cluster in NDB Cluster 8.0 through 8.0.44, as compared to earlier release ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-javascript-documents-find.html
mysql-js> db.countryinfo.find() [ { "GNP": 828, "Code:": "ABW", "Name": "Aruba", "IndepYear": null, "geography": { "Continent": "North America", "Region": "Caribbean", "SurfaceArea": 193 }, "government": { "GovernmentForm": "Nonmetropolitan ... You ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-python-documents-find.html
mysql-py> db.countryinfo.find() [ { "GNP": 828, "Code:": "ABW", "Name": "Aruba", "IndepYear": null, "geography": { "Continent": "North America", "Region": "Caribbean", "SurfaceArea": 193 }, "government": { "GovernmentForm": "Nonmetropolitan ... You ...
https://dev.mysql.com/doc/refman/8.0/en/windows-troubleshooting.html
When installing and running MySQL for the first time, you may encounter certain errors that prevent the MySQL server from starting. This section helps you diagnose and correct some of these errors. Your first resource when troubleshooting server ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-limitations.html
If, when creating tables with a large number of partitions (but less than the maximum), you encounter an error message such as Got error ... However, this is dependent on the operating system, and may not be possible or advisable on all platforms; ... This section discusses current restrictions and limitations on MySQL partitioning ...
https://dev.mysql.com/doc/refman/8.0/en/check-table.html
option: { FOR UPGRADE | QUICK | FAST | MEDIUM | EXTENDED | CHANGED } CHECK TABLE checks a table or tables for errors. Column Value Table The table name Op Always check Msg_type status, error, info, note, or warning Msg_text An informational message ...CHECK TABLE can also check views for problems, such as tables that are referenced in the view definition that no longer ...
https://dev.mysql.com/doc/refman/8.0/en/explain.html
You should be aware that while this makes the output easier to read, it also renders the JSON invalid, causing JSON functions to raise an error. If the value of explain_format is JSON, EXPLAIN ANALYZE returns an error unless FORMAT=TREE is specified ... {EXPLAIN | DESCRIBE | DESC} tbl_name [col_name | wild] {EXPLAIN | DESCRIBE | DESC} [explain_type] {explainable_stmt | FOR CONNECTION connection_id} {EXPLAIN | DESCRIBE | DESC} ANALYZE [explain_type] select_stmt explain_type: { FORMAT = format_name } format_name: { TRADITIONAL | JSON | TREE } explainable_stmt: { select_stmt | TABLE ...
https://dev.mysql.com/doc/refman/8.0/en/create-table-foreign-keys.html
A duplicate symbol results in an error similar to: ERROR 1005 (HY000): Can't create table 'test.fk1' (errno: 121). If an ON UPDATE CASCADE or ON DELETE CASCADE subclause is only defined for one FOREIGN KEY clause, cascading operations fail with an ... MySQL supports foreign keys, which permit cross-referencing related data across tables, and foreign key constraints, which help keep the related data ...